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      A long-life lithium-ion battery with a highly porous TiNb2O7 anode for large-scale electrical energy storage

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          Abstract

          A TiNb2O7 material with a nanoporous structure was prepared by a facile approach and can be used as an anode with excellent rate and cycling performance for long-life stationary lithium-ion batteries.

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          High-performance lithium battery anodes using silicon nanowires.

          Candace K Chan, Hailin Peng, Gao Liu … (2008)
          There is great interest in developing rechargeable lithium batteries with higher energy capacity and longer cycle life for applications in portable electronic devices, electric vehicles and implantable medical devices. Silicon is an attractive anode material for lithium batteries because it has a low discharge potential and the highest known theoretical charge capacity (4,200 mAh g(-1); ref. 2). Although this is more than ten times higher than existing graphite anodes and much larger than various nitride and oxide materials, silicon anodes have limited applications because silicon's volume changes by 400% upon insertion and extraction of lithium which results in pulverization and capacity fading. Here, we show that silicon nanowire battery electrodes circumvent these issues as they can accommodate large strain without pulverization, provide good electronic contact and conduction, and display short lithium insertion distances. We achieved the theoretical charge capacity for silicon anodes and maintained a discharge capacity close to 75% of this maximum, with little fading during cycling.
          Article 0 comments Cited 1341 times – based on 0 reviews     Review now
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            Triblock Copolymer Syntheses of Mesoporous Silica with Periodic 50 to 300 Angstrom Pores

            D. Zhao (1998)
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              High-performance lithium-ion anodes using a hierarchical bottom-up approach.

              A Magasinski, P. Dixon, B. Hertzberg … (2010)
              Si-based Li-ion battery anodes have recently received great attention, as they offer specific capacity an order of magnitude beyond that of conventional graphite. The applications of this transformative technology require synthesis routes capable of producing safe and easy-to-handle anode particles with low volume changes and stable performance during battery operation. Herein, we report a large-scale hierarchical bottom-up assembly route for the formation of Si on the nanoscale--containing rigid and robust spheres with irregular channels for rapid access of Li ions into the particle bulk. Large Si volume changes on Li insertion and extraction are accommodated by the particle's internal porosity. Reversible capacities over five times higher than that of the state-of-the-art anodes (1,950 mA h g(-1)) and stable performance are attained. The synthesis process is simple, low-cost, safe and broadly applicable, providing new avenues for the rational engineering of electrode materials with enhanced conductivity and power.
              Article 0 comments Cited 480 times – based on 0 reviews     Review now
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                Author and article information

                Journal
                Journal ID (publisher-id): EESNBY
                Title: Energy Environ. Sci.
                Abbreviated Title: Energy Environ. Sci.
                Publisher: Royal Society of Chemistry (RSC)
                ISSN (Print): 1754-5692
                ISSN (Electronic): 1754-5706
                Publication date Created: 2014
                Publication date (Print): 2014
                Volume: 7
                Issue: 7
                Pages: 2220-2226
                Article
                DOI: 10.1039/C4EE00508B
                SO-VID: c77e5fe0-098c-4112-b8b3-3c13940d5620
                Copyright © © 2014
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